Smoke-eliminating and draft apparatus for furnaces.



L. W. PIETSCH. SMOKE ELIMINATING AND DRAFT APPARATUS FOR FURNACES. APPLICATION FILED MAB. 25I 1913.

WITNESSEI'S: L PnvvE/vnm 0015 W lefsclv QM By ATTORNEY IHE NORRIS PETERS 60.. FHOTDVLITHO. WASHINGTON D. c

L. W. PIETSLGH.

SMOKE ELIMINATING AND DRAFT APPARATUS FOR FURNACES. APPLICATION FILED MAR. 25, 1913.

1,124,551 3. Patented Jan. 12, 1915.

3 SHEETSSHEET 2.

IIVVENTOR WITNESSES:

Lou/5 W P/efsch ATTORNEY THE NORRIS PETERS C0. PHOTO'LITHD" WASHING ran. D c.

L. W. PIETSGH. SMOKE ELIMINATING AND DRAFT APPARATUS To B FURNACES.

APPLICATION FILED MAR.25,1913.

Patented Jan. 12, 1915.

3 SHEETS-SHEBT 3.

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INVENTOR L 0015 W Pie fsch WITNESSES:

ATTORNEY IHL' NORRIS PETERS CO.,FHO10-L|THO..WASHINGTON. 0.1:.

LOUIS IIVILLIAIVI PIETSCH, OF POST FALLS, IDAHO.

SMOKE-ELIMINATING AND DRAFT APPARATUS FOR FURNACES.

Specification of Letters Patent.

Patented J an. 12, 1915.

Application filed March 25, 1913. Serial No. 756,641. i

To all whom it may concern Be it known that 1, Louis WILLIAM Pierson, a citizen of the United States, residing at Post Falls, in the county of Kootenai and State of Idaho, have invented certain new and useful Improvements in Smoke-Eliminating and Draft Apparatus for Furnaces, of which the following is a specification.

This invention relates to improvements in smoke eliminating and draft apparatus for furnaces and one of the objects of the invention is to collect the soot from smoke during passage of the latter through the apparatus in such a manner that the discharge from the chimney will merely consist of a colorless gas or vapor.

A further object of the invention is to provide a soot collecting apparatus, adapted to contain a suitable liquid, and provided with means for depositing metallic substances carried by the products of coinbustion so as to collect such metals and prevent waste thereof when the collecting liquid is withdrawn for renewal purposes.

In the most improved embodiment of this invention I provide spaced receivers for the smoke, one adapted for reception of the smoke from the furnace and being con nected with the other by a plurality of conducting pipes, the remaining receiver being provided with means for maintaining an induced draft through the apparatus.

Other features of the novelty will be more fully described in connection with the accompanying drawings, and will be more particularly pointed out in and by the appended claims.

In the drawings: Figure 1 is a. view in side elevation of one form of my invention showing parts broken away. Fig. 2 is a sectional view on line 22 of Fig. 1. Fig. 3 is a sectional view on line 3-3 of Fig. 1. Fig. 4 is a perspective view of the construction shown in Fig. 3 in elevation. Fig. 5 is a plan view of the construction shown in Fig. 4. Fig. 6 is a detached perspective view of a reduced pipe section illustrated. in Fig. 3. Fig. 7 is a perspective view of a closure plate. Fig. 8 is a perspective view of a screen.

Like characters of reference designate similar parts throughout the different figures of the drawings.

As illustrated. the device of my invention includes spaced casings or smoke receivers tions containing soot 1 and 2, the former being adapted for direct connection with the furnace to receive the products of combustion therefrom. The receiver 1 is preferably provided with bal'l'le plates 3 which are arranged and disposed to cause the smoke to take a tortuous or circuitous path through the receiver 1. A further function is to arrest and prevent coarser particles, carried by the products of combustion, from passing through casing 1. Casings l and 2 are connected with each other by a plurality of smoke conducting pipes in which are interposed pipe secor smoke eliminating means together with electrical means for depositing certain metallic substances, the foregoing being one of the most important features of the invention.

In the specific construction shown I provide three rows of piping, each row consisting of three pipes and designated by 4-, 5 and 6. The pipes at, 5 and G communicate with casing 1 in the rear thereof, with re spect to the path of the smoke as is indicated by the arrow. and said pip ng 4-, 5 and'6 preferably extend horizontally from said casing with elbows 7, 8 and 9 terminat ng vertically. Dampers 10, 11 and 12. one for each pipe, provide means for regulating or cutting any of said pipes out of service. Upon the vertically terminating elbows are disposed pipe sections 13. 14 and 15 which are preferablv formed of vitrified material or anv material which is a non-conductor of electricit the purpose and construction of which will be hereinafter more fullv described. The sections 13. 14 and 15 deliver to piping 16. 17 and 18 of relativelv reduced size with respect to the sect ons 13. 14 and 15. and the piping 16. 17 and 18 delivers to easing 2, as clearlv shown in Figs. 1 and 2.

cans is provided for maintaining an induced draft through the apparatus and such means ma consist of a fan 19 directly connected with a motor 20, both of which may be disposed in the casing 2. and the casing 2 is provided with an outlet 21. Each section 13. 14 and 15 is composed of two parts of identical construction disposed in superposed relat on and therefore only one part section will be described in detail, reference being made more particularly to Figs. 3, 1 and 5. One of the superposed sections is shown in Fig. 3 provided with a flange 22 ada ed to seat u on an inclosing or housing flange 23 of the terminal 7. The upper mation with open ends.

end of section 3 is provided with a closure disk seat 24, for a closure disk 25, and also with a recessed seat 26 adapted to receive the lower flanged end of the superposed section. Suitable locking means is provided for securing the superposed sections in place, and such means may sonsist of pivoted retaining elements 27 having handle portions 28 and lug portions 29. When the elements 27 are shifted on their pivots the lug portions 29 may be brought in overlapping and locking relation with the flange of the superposed section which may be disposed in the recessed seat 26. 1

The closure disk may be provided with notches 30 adapted to be brought in registry with lugs 31, for assembling purposes and the disk 25 may thereafter be shifted or turned to dispose the notches 30 out of regis- 1 try with the lugs 31 so as to lock the disk 23 against upward movement. The closure disk 25 acts as a support for an outlet pipe section 32 which is provided with a flange 33 adapted to be disposed in a recessed seat 34 in the disk 25. The flange 33 is provided with notches 36 adapted to be brought into registry with lugs 37, when the parts are assembled, and thereafter shifted or turned out of registry therewith to lock the outlet pipe section in place against upward displacement. Near the lower end of the outlet section 32 I provide a shoulder 38- adapted to support a reticulated sieve or screen 39 which may as shown be of cylindrical for- The screen 39 may be secured to a ring 40 adapted to seat on the shoulder 38. The screen 39 is preferably formed of metal. A metallic frame which may consist of rods or bars 41, is mounted upon the outlet pipe section 32 and said bars or rods may be connected with the flange 33 thereof, as shown in Fig. 3. The bars 41 are electrically connected with each other by a band 42.

I have diagrammatically illustrated an electric circuit including a source of current 43 with one pole thereof connected by line 44 with screen 39, and the other pole thereof connected by line 45 with band 42. switch 46 may be interposed in the circuit to cut the same into and out of operation. The frame bars 41 may form the cathode and the screen 39 the anode for effecting electro-deposition of certain metals carried by the products of combustion. Within the section 13 is a collecting cup 47 which may be formed integral with the section 13 and which may be suspended therein by webs or leave a passage flanges 48 which are spaced apart so as to for smoke between the cup 47 and the interior wall of section 13. The path of the smoke through section 13 is in dicated by the arrows and it will be seen that the imperforate end 49 of the cup faces the incoming smoke while the open end 50. is

disposed. above the lower end of the outlet section 32. The cup 47 is adapted to contain a smoke eliminating and collecting liquid, which may be water, and the level of the liquid is maintained as shown above the lower end of section 32 so as to form a trap through which the smoke must pass from section 13 to section 32. Near the lower end of section 32 1 provide a plurality of openings 32 through which the vapor may pass when the induced draft is low and perhaps not sufficient to conduct the vapor below the lower margin of section 32. It will also be seen that the screen 39 and the lower ends of bars 41 are immersed in the liquid thereby permitting said parts to be used for electrodeposition of any valuable metal thereon. The passage of the smoke through the liquid serves to collect the soot and all other mat ter or substances carried by the smoke so that the discharge at 21 will be a colorless vapor.

The collecting cup 49 is provided with an outlet pipe 51 which leads from the bcttom of the cup so as to effectively drain all of the contents therefron. The pipe 51 eX- tends through section 13 and may be provided with any suitable form of valve closure such as a pet cock 52. An intake pipe 53 leads through section provided with a flared funneled terminal 54 to facilitate the pouring of liquid therein. The intake pipe 53 may also be provided with a valve closure 55. It will thus be seen that when the collecting liquids are fully impregnated the cups of any pipe may be readily emptied and cleaned and the pipe of such cup may be thrown out of service by turning the damper thereof, and this may be accomplished without impairing the efliciency of the apparatus as regards the other piping. After all matter has been eliminated from the smoke to reduce the same to a colorless vapor, by passage of the smoke through the collecting liquid, the volume will be greatly reduced and therefore the outlet pipes 32 are reduced in size with respect to sections 13 and the extension piping 16, 17 and 18 are still further reduced so as to permit the use of a fan of relatively small size and at the same time obtain an efficient induced draft, it being understood that the reduction in cross section of the piping, corresponding to the reduction in volume of the contents passing therethrough greatly reduces the area through which the draft is to be maintained.

In the operation of furnaces for various commercial purposes a great deal of expense has been heretofore necessitated in building high chimneys was to discharge the fumes and gases at a high elevation from the earth owing to the injurious effects upon vegetation and even when such gases and fumes are discharged at a high elevation such injuri- 13 to cup 49 and 1s ous effects are not avoided. It will be seen that by the provision of my improved draft apparatus the height of the chimney or stack for affording the necessary draft is not only entirely avoided, but in addition, I am able to entirely eliminate the discharge of noxious chemical substances and can also preserve residual portions thereof which may be valuable. Such materials as may be acted upon by electrolysis may be deposited on the bars 41 or the screen 39 and ter as may be without value, but which would be detrimental if discharged, may be collected and taken care of through the cups 49.

While I have herein shown and described one specific embodiment of my invention, I do not wish to be limited thereto except for such limitations as the claims may import.

I claim 1. In a spark arrester, a conducting pipe having an upright cylindrical pipe section of vitrified material interposed therein and including a cylindrical cup mounted in said upright section between the ends thereof in concentric spaced relation with respect to the interioriof said section, said cup and section having superposed inlet and outlet pipes formed integral therewith and extending through said section and opening into said cup, the upper end of said section having an inner annular closure seat portion and an outer annular pipe seat portion one being above the other, a disk pipe supporting closure disposed in said closure seat por- Copies such mattion and provided with an opening having a pipe seat therein, an outlet pipe projecting downwardly through said closure opening into said cup and having its upper end provided with a flange engaging the seat in said closure opening, and a pipe section having its lower end disposed in the outer pipe seat portion of said upright section, substantially as described.

In a spark arrester, a conducting pipe having an upright cylindrical pipe section interposed therein and including a cylindrical cup mounted in said section between the ends thereof in spaced relation with respect to the interior of said section, the upper end of said section having an inner annular closure seat portion and an outer annular pipe seat portion, the latter being above the former, a dish pipe supporting closure disposed in said closure seat to close egress through the upper end of said section and provided with an opening having an outlet pipe seat therein, an outlet pipe pro ecting downwardly through said closure seat opening into said cup and having its upper end provided with a flange engaging the seat in said closure, and a pipe section having its lower end disposed in the outer pipe seat of said upright section, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

LOUIS WILLIAM PIETSCI-I. Witnesses:

IIAROLD SCANTLEBURY, EDNA BROYLES.

0! this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

